Elmore County, Idaho
Precinct data
Results by precinct
17 precincts · 10,672 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -MOUNTAIN HOME 8MOUNTAIN HOME 8 | 458 | 1,381 | 37 | 1,876 | 24.4% | 73.6% | R+49.2 |
|---|---|---|---|---|---|---|---|
| Precinct -MOUNTAIN HOME 2MOUNTAIN HOME 2 | 288 | 799 | 28 | 1,115 | 25.8% | 71.7% | R+45.8 |
| Precinct -MOUNTAIN HOME 9MOUNTAIN HOME 9 | 252 | 804 | 27 | 1,083 | 23.3% | 74.2% | R+51.0 |
| Precinct -MOUNTAIN HOME 5MOUNTAIN HOME 5 | 250 | 797 | 32 | 1,079 | 23.2% | 73.9% | R+50.7 |
| Precinct -MOUNTAIN HOME 4MOUNTAIN HOME 4 | 200 | 630 | 21 | 851 | 23.5% | 74.0% | R+50.5 |
| Precinct -MOUNTAIN HOME 3MOUNTAIN HOME 3 | 238 | 516 | 30 | 784 | 30.4% | 65.8% | R+35.5 |
| Precinct -MOUNTAIN HOME 7MOUNTAIN HOME 7 | 205 | 561 | 12 | 778 | 26.3% | 72.1% | R+45.8 |
| Precinct -MOUNTAIN HOME 6MOUNTAIN HOME 6 | 217 | 512 | 29 | 758 | 28.6% | 67.5% | R+38.9 |
| Precinct -MOUNTAIN HOME 1MOUNTAIN HOME 1 | 163 | 522 | 17 | 702 | 23.2% | 74.4% | R+51.1 |
| Precinct -GLENNS FERRYGLENNS FERRY | 148 | 528 | 17 | 693 | 21.4% | 76.2% | R+54.8 |
| Precinct -MAYFIELDMAYFIELD | 65 | 205 | 7 | 277 | 23.5% | 74.0% | R+50.5 |
| Precinct -HAMMETTHAMMETT | 38 | 196 | 6 | 240 | 15.8% | 81.7% | R+65.8 |
| Precinct -KING HILLKING HILL | 40 | 127 | 3 | 170 | 23.5% | 74.7% | R+51.2 |
| Precinct -PINEPINE | 20 | 88 | 1 | 109 | 18.3% | 80.7% | R+62.4 |
| Precinct -PRAIRIEPRAIRIE | 10 | 55 | 2 | 67 | 14.9% | 82.1% | R+67.2 |
| Precinct -CHATTIN FLATSCHATTIN FLATS | 6 | 48 | 1 | 55 | 10.9% | 87.3% | R+76.4 |
| Precinct -ATLANTAATLANTA | 13 | 22 | 0 | 35 | 37.1% | 62.9% | R+25.7 |
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | −34.8% |
| 1896 | +62.3% |
| 1900 | +18.0% |
| 1904 | −14.3% |
| 1908 | −0.1% |
| 1912 | +7.9% |
| 1916 | +24.1% |
| 1920 | −10.2% |
| 1924 | −19.7% |
| 1928 | −20.6% |
| 1932 | +33.0% |
| 1936 | +36.9% |
| 1940 | +20.5% |
| 1944 | +22.4% |
| 1948 | +29.4% |
| 1952 | −5.4% |
| 1956 | −2.5% |
| 1960 | +4.6% |
| 1964 | +10.9% |
| 1968 | −18.0% |
| 1972 | −41.6% |
| 1976 | −12.7% |
| 1980 | −36.3% |
| 1984 | −51.4% |
| 1988 | −28.3% |
| 1992 | −17.8% |
| 1996 | −19.5% |
| 2000 | −43.8% |
| 2004 | −50.3% |
| 2008 | −36.4% |
| 2012 | −33.9% |
| 2016 | −47.0% |
| 2020 | −45.5% |
| 2024 | −48.5% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 20.2%2,668 | 66.3%8,760 | 13,210 |
| 2020 | R | 27.8%2,814 | 67.2%6,797 | 10,119 |
Registered voters
By party of registration, over time
Registration leans Republican; the presidential vote runs 4.1 points more Republican.
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2018 | 10,395 | 957 | 6,001 | 3,312 | 125 |
| 2020 | 12,646 | 1,430 | 7,520 | 3,522 | 174 |
| 2022 | 12,334 | 1,358 | 7,712 | 3,059 | 205 |
| 2024 | 13,083 | 1,381 | 8,271 | 3,217 | 214 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
−334 net domestic migration · 2025
Net −3,887 over 2011–2025 · gain loss
Arrivals reported $51,922 in average income, against $62,945 for residents who stayed — 18% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+22.1 on average — 26 points more Democratic-leaning than Elmore County, ID itself (R+48.5).
Where arrivals came from lean of each source
- Ada County, ID227R+10.3
- Canyon County, ID66R+46.6
- Owyhee County, ID23R+67.6
Where departures went households, 2022–23
- Ada County, ID302
- Canyon County, ID80
- Owyhee County, ID22
- Maricopa County, AZ21
- Twin Falls County, ID21
- Bexar County, TX21
Migration is one input to a place’s political change, not its cause — a shift can also come from residents changing their minds, generational turnover, or turnout. These figures describe the places people moved between; they do not measure how any mover voted.
| Year | Net domestic migration |
|---|---|
| 2011 | −1,259 |
| 2012 | −496 |
| 2013 | −451 |
| 2014 | −500 |
| 2015 | −914 |
| 2016 | −93 |
| 2017 | +400 |
| 2018 | +212 |
| 2019 | −153 |
| 2021 | +37 |
| 2022 | +124 |
| 2023 | −131 |
| 2024 | −329 |
| 2025 | −334 |
Elmore County, anchored by Mountain Home and its Air Force base, delivers some of the widest Republican presidential margins in the state, with 2024's R+48.7 gap reflecting a rural electorate that has grown more consolidated over successive cycles.
Across the recorded series it reached a Democratic high of 62.3 points in 1896 and a Republican high of 51.4 points in 1984. Between 2020 and 2024 the county moved 3.0 points toward the Republican candidate; the 2024 margin was 48.5 points.
A population of 29,321, a 70% non-Hispanic-white share, and a median household income of $65,359 describe the county. The county's voting pattern over the last decade is most similar to that of Humboldt County and Payette County.
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
Browse places by community — income, education, race & ethnicity, language — all community cuts →
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Elmore County, Idaho. Akashic. https://akashic.app/county/16039/. Accessed May 20, 2026. License: CC BY 4.0.